Long term it's going to be best to use unique content. You can use some duplicate content but I would make the majority of it unique for the best results.

As far as spun goes, if you're not worried about long term rankings and you just want quick rankings then it can help. Personally, I've stopped using spun content on my tier 1 unless I already have a really good link profile or I don't care about the domain eventually getting penalized when Google brings the ban hammer down on spun content.

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